mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
277 lines
7.7 KiB
C
277 lines
7.7 KiB
C
// AVI file parser for DEMUXER v2.6 by A'rpi/ESP-team
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//static float avi_pts_frametime=1.0f/25.0f;
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static float avi_audio_pts=0;
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static float avi_video_pts=0;
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static int skip_video_frames=0;
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static inline int avi_stream_id(unsigned int id){
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unsigned char *p=(unsigned char *)&id;
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unsigned char a,b;
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a=p[0]-'0'; b=p[1]-'0';
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if(a>9 || b>9) return 100; // invalid ID
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return a*10+b;
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}
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// Select ds from ID
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static inline demux_stream_t* demux_avi_select_stream(demuxer_t *demux,unsigned int id){
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int stream_id=avi_stream_id(id);
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if(stream_id==demux->audio->id) return demux->audio;
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if(stream_id==demux->video->id) return demux->video;
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if(id!=mmioFOURCC('J','U','N','K')){
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// unknown
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if(verbose>=2) printf("Unknown chunk: %.4s (%X)\n",&id,id);
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}
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return NULL;
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}
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static int demux_avi_read_packet(demuxer_t *demux,unsigned int id,unsigned int len,int idxpos){
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int d;
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// int len;
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int skip;
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float pts=0;
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unsigned char c=0;
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demux_stream_t *ds=demux_avi_select_stream(demux,id);
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if(verbose>=3) printf("demux_avi.read_packet: %X\n",id);
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if(ds==demux->audio){
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pts=avi_audio_pts;
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avi_audio_pts=0;
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} else
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if(ds==demux->video){
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// video
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if(skip_video_frames>0){
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// drop frame (seeking)
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--skip_video_frames;
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ds=NULL;
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} else {
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pts=avi_video_pts;
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}
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// ezt a 2 sort lehet hogy fell kell majd cserelni:
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//avi_video_pts+=avi_pts_frametime;
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avi_video_pts+=(float)avi_header.video.dwScale/(float)avi_header.video.dwRate;
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avi_audio_pts=avi_video_pts;
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}
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// len=stream_read_dword_le(demux->stream);
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skip=(len+1)&(~1); // total bytes in this chunk
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if(ds){
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if(verbose>=2) printf("DEMUX_AVI: Read %d data bytes from packet %04X\n",len,id);
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ds_read_packet(ds,demux->stream,len,pts,idxpos);
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skip-=len;
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}
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if(skip){
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if(verbose>=2) printf("DEMUX_AVI: Skipping %d bytes from packet %04X\n",skip,id);
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stream_skip(demux->stream,skip);
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}
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return ds?1:0;
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}
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//static int num_elementary_packets100=0;
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//static int num_elementary_packets101=0;
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// return value:
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// 0 = EOF or no stream found
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// 1 = successfully read a packet
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int demux_avi_fill_buffer(demuxer_t *demux){
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unsigned int id=0;
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unsigned int len;
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int skipped=0;
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int max_packs=128;
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int ret=0;
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do{
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AVIINDEXENTRY *idx=NULL;
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demux->filepos=stream_tell(demux->stream);
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if(demux->filepos>=demux->endpos){
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demux->stream->eof=1;
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return 0;
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}
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if(stream_eof(demux->stream)) return 0;
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if(avi_header.idx_size>0 && avi_header.idx_pos<avi_header.idx_size){
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unsigned int pos;
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//if(avi_header.idx_pos<0) printf("Fatal! idx_pos=%d\n",avi_header.idx_pos);
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idx=&avi_header.idx[avi_header.idx_pos++];
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//printf("[%d]",avi_header.idx_pos);fflush(stdout);
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//stream_seek(demux->stream,idx.dwChunkOffset);
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//printf("IDX pos=%X idx.pos=%X idx.size=%X idx.flags=%X\n",demux->filepos,
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// pos-4,idx->dwChunkLength,idx->dwFlags);
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if(idx->dwFlags&AVIIF_LIST){
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// LIST
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continue;
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}
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if(!demux_avi_select_stream(demux,idx->ckid)){
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if(verbose>2) printf("Skip chunk %.4s (0x%X) \n",&idx->ckid,idx->ckid);
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continue; // skip this chunk
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}
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pos=idx->dwChunkOffset+avi_header.idx_offset;
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if(pos<avi_header.movi_start || pos>=avi_header.movi_end){
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printf("ChunkOffset out of range! current=0x%X idx=0x%X \n",demux->filepos,pos);
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continue;
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}
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#if 0
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if(pos!=demux->filepos){
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printf("Warning! pos=0x%X idx.pos=0x%X diff=%d \n",demux->filepos,pos,pos-demux->filepos);
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}
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#endif
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stream_seek(demux->stream,pos);
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id=stream_read_dword_le(demux->stream);
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if(id!=idx->ckid){
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printf("ChunkID mismatch! raw=%.4s idx=%.4s \n",&id,&idx->ckid);
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continue;
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}
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len=stream_read_dword_le(demux->stream);
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// if((len&(~1))!=(idx->dwChunkLength&(~1))){
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// if((len)!=(idx->dwChunkLength)){
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if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
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printf("ChunkSize mismatch! raw=%d idx=%d \n",len,idx->dwChunkLength);
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continue;
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}
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} else {
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id=stream_read_dword_le(demux->stream);
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len=stream_read_dword_le(demux->stream);
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if(id==mmioFOURCC('L','I','S','T')){
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id=stream_read_dword_le(demux->stream); // list type
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continue;
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}
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}
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ret=demux_avi_read_packet(demux,id,len,avi_header.idx_pos-1);
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if(!ret && skip_video_frames<=0)
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if(--max_packs==0){
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demux->stream->eof=1;
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printf("demux: file doesn't contain the selected audio or video stream\n");
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return 0;
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}
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} while(ret!=1);
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return 1;
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}
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// return value:
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// 0 = EOF or no stream found
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// 1 = successfully read a packet
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int demux_avi_fill_buffer_ni(demuxer_t *demux,demux_stream_t* ds){
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unsigned int id=0;
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unsigned int len;
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int skipped=0;
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int max_packs=128;
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int ret=0;
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do{
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AVIINDEXENTRY *idx=NULL;
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int idx_pos=0;
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demux->filepos=stream_tell(demux->stream);
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if(ds==demux->video) idx_pos=avi_header.idx_pos_a++; else
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if(ds==demux->audio) idx_pos=avi_header.idx_pos_v++; else
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idx_pos=avi_header.idx_pos++;
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if(avi_header.idx_size>0 && idx_pos<avi_header.idx_size){
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unsigned int pos;
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idx=&avi_header.idx[idx_pos];
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if(idx->dwFlags&AVIIF_LIST){
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// LIST
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continue;
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}
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if(ds && demux_avi_select_stream(demux,idx->ckid)!=ds){
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if(verbose>2) printf("Skip chunk %.4s (0x%X) \n",&idx->ckid,idx->ckid);
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continue; // skip this chunk
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}
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pos=idx->dwChunkOffset+avi_header.idx_offset;
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if(pos<avi_header.movi_start || pos>=avi_header.movi_end){
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printf("ChunkOffset out of range! current=0x%X idx=0x%X \n",demux->filepos,pos);
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continue;
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}
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#if 0
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if(pos!=demux->filepos){
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printf("Warning! pos=0x%X idx.pos=0x%X diff=%d \n",demux->filepos,pos,pos-demux->filepos);
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}
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#endif
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stream_seek(demux->stream,pos);
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id=stream_read_dword_le(demux->stream);
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if(stream_eof(demux->stream)) return 0;
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if(id!=idx->ckid){
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printf("ChunkID mismatch! raw=%.4s idx=%.4s \n",&id,&idx->ckid);
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continue;
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}
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len=stream_read_dword_le(demux->stream);
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// if((len&(~1))!=(idx->dwChunkLength&(~1))){
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// if((len)!=(idx->dwChunkLength)){
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if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
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printf("ChunkSize mismatch! raw=%d idx=%d \n",len,idx->dwChunkLength);
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continue;
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}
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} else return 0;
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ret=demux_avi_read_packet(demux,id,len,idx_pos);
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if(!ret && skip_video_frames<=0)
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if(--max_packs==0){
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demux->stream->eof=1;
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printf("demux: file doesn't contain the selected audio or video stream\n");
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return 0;
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}
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} while(ret!=1);
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return 1;
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}
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// return value:
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// 0 = EOF or no stream found
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// 1 = successfully read a packet
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int demux_avi_fill_buffer_nini(demuxer_t *demux,demux_stream_t* ds){
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unsigned int id=0;
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unsigned int len;
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int skipped=0;
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int ret=0;
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int *fpos=NULL;
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if(ds==demux->video) fpos=&avi_header.idx_pos_a; else
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if(ds==demux->audio) fpos=&avi_header.idx_pos_v; else
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return 0;
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stream_seek(demux->stream,fpos[0]);
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do{
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demux->filepos=stream_tell(demux->stream);
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if(demux->filepos>=demux->endpos){
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demux->stream->eof=1;
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return 0;
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}
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if(stream_eof(demux->stream)) return 0;
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id=stream_read_dword_le(demux->stream);
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len=stream_read_dword_le(demux->stream);
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if(id==mmioFOURCC('L','I','S','T')){
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id=stream_read_dword_le(demux->stream); // list type
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continue;
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}
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if(ds==demux_avi_select_stream(demux,id)){
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// read it!
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ret=demux_avi_read_packet(demux,id,len,avi_header.idx_pos-1);
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} else {
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// skip it!
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int skip=(len+1)&(~1); // total bytes in this chunk
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stream_skip(demux->stream,skip);
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}
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} while(ret!=1);
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fpos[0]=stream_tell(demux->stream);
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return 1;
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}
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